Screw-press to form insulators.



R. G. HEMINGRAY 62: (LHAWK.

SCREW PRESS TO FORM INSULATORS. APPLICATION FILED AUG. 9, 1907.

909,595, Patented Jan. 12, 1909.

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R. G. HEMINGRAY & O. HAWK.

SCREW PRESS TO FORM INSULATORS.

APPLICATION II-LED mm. 9, 1907.

909,595. I Patented Jan. 12, 1909.

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SCREW PRESS TO FORM INSULATORS.

APPLICATION FILED AUG. 9, 1907.

Patented Jan. 12,1909.

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RALPH G. HEMINGHAY AND CHARLES HAWK, OF MUNCIE, INDIANA, ASSIGNORS TO HEMINGRAY GLASS COMPANY, OF MUNOIE, INDIANA, A CORPORATION OF KENTUCKY.

SCREW-PRESS TO FORM INSULAIORS.

1 '0 all whom it may concern:

Be it known that we, RALPH G. HEMIN- GRAY and CHARLES HAWK, citizens of the United States, and residents of .lvluncie, in the county of Delaware and State of Indiana, have inventeda certain new and useful Improvement in Screw-Presses to Form Insulators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of our specification.

Our invention relates to a press for forming insulators, in which a screw, to form the thread, is impressed in the molten glass at the time that the insulator is formed in the mold, and in which, after the glass has suiticiently hardened by cooling, the mold containing the insulator with the screw inserted in it, is presented to a rotary spindle, by means of which it is screwed out of, and withdrawn from, the hot glass, leaving the threads properly formed within the insulator. Prior to our invention it has been necessary to employ one operative in the use of such a machine, to insert a fresh screw in the plunger at each operation of the same.

The object of our invention is to do away with such operative, and to this end we have devised for a machine of the class described,

an automatic attachment which supports a series of screws in position ready for use in the vicinity of the plunger, and which successively places a fresh screw in position in the plunger, after each operation.

In carrying out our invention we make use of a stationary plate which supports a number of the screws, and of an, intermit tently rotating ring, having socket-s which determine the position of said screws with reference to the receiving and placing mechanism; and of an oscillating, socketed arm which alternately comes into position below a notch in said supporting plate to receive one of the screws as the said ring is intermittently operated to bring a screw above said notch, and then oscillates back into position below the plunger,said socketed arm having within it a screwsupporting-trigger, which is at the proper time struck so as to raise the screw into position to be received and held by the plunger. Suitable cams and pawls, supported and operated by the plunger and table, give proper movement to the parts, as above described.

In the drawings :Figure 1 is a perspec- Specification of Letters Patent.

Application filed August 9, 1907. Serial No. 387,922.

Patented Jan. 12, 1909.

tive view of a screw press for forming insulators to which our improvement is attached; Fig. 2 is a front elevation of that portion of the machine above the rotating table; Fig. 3 is an elevation of the same mechanism looked at from the right of Fig. 2; Fig. i is a partial horizontal section on an enlarged scale on the lines et4c of Fig. 2; Figs. 5 and 6 are elevations at the limits of movement of one of the operating cams to be referred to later; Fig. 7 is a vertical section through the socketed arm which receives and delivers the screws to the plunger; Fig. 8 is an elevation of the supporting plate and intermittently rotating ring with the cam and arm operating the same; Fig. 9 is a vertical section through Fig. 8 in a plane parallel to the paper; and Fig. 10 is a detail view, looked at from the under side, of the mechanism operating the intermittently rotating disk, with the lower retaining plate left off.

The general features of the machine itself need no particular description as it is of the usual type, well known to the art and. more particularly described in the patent to Kribs, #532,973, granted January 22nd, 1895. Briefly, such a press comprises a supporting framework A, a rotatable, mold-carrying table B, a depressible plunger C, an arm for operating the same, D, and a balanced rotatable spindle E. At the lower end of the plunger C is a socket 0 adapted, upon the insertion of the shank of one of the screws O to receive and hold it. The rotatable spindle E has any usual socketed shank c with mechanism contained therein to release the screw shank after it has withdrawn the screw from the insulator in the mold.

F is the supporting plate, and G the intermittently rotating socketed ring, which together support the screws; and J is the oscillating arm which receives the screw from the supporting plate and ring F, G, and delivers it to the socketed shank c in the plunger O. The plate F is provided with an extension F by means of which it is secured in any convenient manner to the vertical rod E which supports the rotary spindle E (see Figs. 3, l, 8 and 9).

G is the socketed ring, which is rotatably supported on the plate F. It has a web G at the bottom and a downwardly projecting shank J by means of which it is journaled to the plate F. Plates g, g, are loosely journaled on the shank G and between them is. a ratchet g. keyed othe, h nk G The parts, are secured together by means of. a nut and washer, or in any other suitable manner. The ring G isprovided with a series of sockets Gr of a size to receive the screws 0" and adjacent each of these. sockets, the outer vertical face of the ring is cut out as indicated at G for a purpose that will become presently apparent.

The oscillating arm J is rotatably supported in any convenient manner upon the upright rod-C which forms one of the guides for the plunger frame, and as illustrated, upon that one nearest the center of the table (see Figs. 1, 2,4 and 7 This arm, J as shown, is, cast in sections adapted to be screwed or bolted together, and said sections are of" such shape, that when properly secured together, there is formed at one, end a bearing 7', which embraces the rod C at the other end, a socket J, of a size to receive loosely one of the. screws; and between the two, a slot j ot substantially the depth of the arm itself, opening into the socket J. A trigger J is pivoted in the slot One end K, normally rests. in the path of a series of cams K which are supported from the table B. The ends ofthis trigger are preferably provided with rollers to reduce friction and to facilitate its operation.

A cam-plate L. is bolted to one side of the yoke L, whichguides the plunger. This cam-plate is curved (sec FigsQQ, 5 and 6), and is provided with a cain'groovel, into which projects a pin Z secured to the bearing j of the arm J. This pin is preferably provided with an anti-friction roller. The slot Z is of such shape that, as the plunger descend's, and with it the cam-plate L, the engagement of thepin Z with the cam-groove Z, causes the arm J to oscillate about the rod G as an axis, until it comes into position. under a notched-out portion L" in the plate Ff The return movement of the plunger of course causes a reverse movement ofthe arm J -so as to bring it back, into its position immediately under the plunger itself.

M is another cam-plate (see Figs. 2, 3, 8 and 10) which: serves to intermittently rotate the socketed ring G, so to bring one of the sockets above the notched-out portion L in the plate F at each operation of the plunger.

This cam is secured toa horizontal arm M" (see Fig, 8), which is pivoted at one end to the plates 9, g, and near its other end rides on a flanged-roller m, secured to the rod E.

A spring-controlled pawl m is journaled between'the plates 9,9", in position to engage the ratchet g. A back-ratchet m opposite the pawl m" prevents back movement of the ratchet. The cam plate M is provided with the cam-slot h in which works a pin M secured; to the yoke L (see Figsi 2, 3'and 8). As the yoke descends, the

movement of the pin M in the cam slot M causes the bar M. to rotate the, plates 9, g, and with them. the pawl m, so as to move the ring G one notch. Upon the 'IISQ of the plunger the parts are taken back into 7 their first position ready to rotate the ring at the next operation.

The operation of our improvement is apparent from this description. A number of screws are placed in the socketed ring G, the number being determined by the rapidity with which they cool, it being understood of course, that this number be not so large that when a screw reaches the position where it will be taken by the oscillating arm J, and" delivered to the plunger, it has become too cold. Starting with the apparatus in the position wherea fresh screw has been delivered to the plunger, and a mold, previously filled with molten glass, has been brought into position beneath the plunger. It s is hardly a correct description of the Kribs patented maphine, referred to in the specification, to say that an empty mold is brought under the plunger. It is empty in that no screw has been put in to it but it contains the glass which has been placed in it by thegatherer just before it reaches the position under the plunger. The arm D is depressed, which causes the depression of the plunger G',thuscmbedding the screw G in the molten glass. As the plunger descends, the cam-plates L and M are brought into play, 501 thatv the; arm J is rotated out of its position beneath the plunger and out of the path of the descending screw into a position under the notch L in the plate F, while at the same time the socketed ring G is rotated in time to bring a fresh screw into position above said notch L, so that when said arm J has been brought beneath the notch, a screw will fall into the socket J coming to rest at the forward end of the trigger J The reverse movement of. the arinD raises the plunger C, the screw being released and left embedded in the glass in the mold thus causing the rotation of the arm J back into its position under the plunger, carrying in its socket J a fresh screw. The table B is then rotated so as to bring a fresh mold under the plunger. and this rotation ofthe table brings one of the cams 1 into en agement with the rear b r ;being repeated at each depression of the plunger, and rotation of the table to bring a a fresh mold underthe plunger. Themolds containing the hot glass and the embedded screws, by the intermittent rotation of the table, are successively brought into position under the balanced rotatable spindle E. By the time this position is reached, the glass is sufliciently cooled to remove the screws, and as each mold is brought into this position, an operative depresses the spindle to engage and grasp the upwardly projecting shank of the screw, and then rotates the spindle to withdraw the screw in the usual manner, thus completing the formation of the thread in the insulator. The screw itself is then placed in a socket of the ring G, ready to be used again when its turn comes.

o have shown and described herein a particular mechanism to carry out our invention, but of course do not wish to be limited to the mechanical details thereof, as it is apparent that they may be modified and changed without departing from the spirit of our invention.

Having thus described our invention, what we desire to claim as new, and to cover by Letters Patent, is

1. In a machine of the class described, a support adjacent the plunger, an arm adapted to oscillate between such support and said plunger, and mechanism operated by said plunger adapted to trip said support, and to oscillate said arm.

2. In a machine of the class described, a supporting member located adjacent the plunger and a delivering member adapted to receive a screw from the supporting member and deliver it to the plunger at each operation of the same.

In a machine of the class described, in combination with the plunger, a support for a series of screws adjacent the plunger, and automatic mechanism adapted to receive one of the screws from said support and deliver it to the plunger at each operation of the same.

4. In a machine of the class described, in combination with the plunger, a supporting member adapted to release the screws in succession. one at a time, and a delivery member moving between said supporting member and said plunger, adapted to receive and deliver to the plunger a fresh screw at each operation of said plunger.

In a machine of the class described, in combination with the plunger, a supporting member adapted to release the screws in succession, one at a time, a delivery member moving between said supporting member and said plunger, adapted to receive and deliver to the plunger a fresh screw at each operation of said plunger, and mechanism to produce the automatic movement of the parts.

6. In a machine of the class described, in combination with the plunger, a supporting member adapted to release the screws in succession, a delivery member moving between the supporting member and the plunger adapted to receive a screw and deliver it to the plunger at each operation of the same, and mechanism to produce the cooperative movement of the parts.

7. In a machine of the class described, in combination with the plunger, a supporting member adapted to release the screws in succession, a delivery member moving between the supporting member and the plunger, a trigger on said delivery member to catch and support a screw and movable to push the screw into place in the plunger, and mechanism to produce the cooperative movement of the parts at each operation of the plunger.

8. In a machine of the class described in combination with the plunger, a supporting member comprising a fixed plate having a delivery opening, and a rotatable disk provided with holes to receive the screws, said holes passing in succession over said delivery opening, a delivery member moving between said plunger and said supporting member, adapted to receive and deliver a screw to the plunger at each operation of the same, and mechanism to produce the cooperative movement of the parts.

9. In a machine of the class described, in combination with the plunger, a fixed plate having a delivery opening, an intermittently rotating ring, located on said plate, provided with holes, one of said holes being brought above the delivery opening at each operation, an intermittently oscillating arm moving between said plunger and the delivery opening in said fixed plate, a supporting trigger connected to said oscillating arm, said trigger being movable in line with the axis of the plunger, and mechanism to produce the cooperative movement of the parts.

10. In a machine of the class described, in combination with the plunger and the rotatable table, a fixed plate having a delivery opening, an intermittently rotating ring located on said plate, provided with holes, one of said holes being brought above the delivery opening at each operation, an intermittently oscillating arm moving between said plunger and the delivery opening in said fixed plate, a supporting trigger connected to said oscillating arm, said trigger being movable in line with the axis of the plunger, and mechanism actuated by the plunger to rotate the said ring and to oscillate the said arm, and cams carried by the table to actuate the said trigger.

11. In a machine of the class described, in combination with the plunger and the rotatable table, a fixed plate having a delivery opening, an intermittently rotating ring located on said plate provided with holes, one of said holes being brought above the delivery opening at. each operation, an in-. l combination with the plunger, a, supporting tennittently oscillating arm moving between said plunger and the delivery opening in said fixed plate, a supporting trigger con nected to said oscillating arm, said trigger being movable in line with the axis of the plunger, cams carried by said plunger adapted to. intermittentlyoscillate said arm and rotate. said ring, and cams carried by 1.0 the table to operate said trigger. 1

12. In a machine of the class described, in

member adapted to automatically release the screws: in succession and a delivery member adapted to automatically receive 15 and deliver a fresh screw to the plunger-ateach operation of thesaine.

RALPH G. HEMINGRAY.

CHAS.

it-messes;

JNO. C. GRAY,

JAS. Gr. MENDE HALL. 

